ID 442426.04
42
WE KEEP THINGS MOVING
Technical data
4
Manual SD6
False triggering – causes
Depending on stray capacitances and asymmetries, stray currents up to 40 mA
may occur during operation. Undesirable false triggering occurs
•
... when drive controllers to the supply voltage.
This false triggering can be rectified by using short-time delayed (super-
resistant), selective (delayed switch-off) residual current protective devices
or RCDs with increased trigger current
(for example 300 or 500 mA).
•
... Due to higher frequency stray currents for long motor cables under
normal operating conditions:
This false triggering can be rectified for example using low-capacitance
cables or output deraters.
•
... due to unbalances in the supply network.
This false triggering can be rectified for example using an isolating
transformer.
Installation
DANGER!
Electric shock hazard!
Stray and residual currents with a DC current component can restrict the
functionality of residual current protective devices types A and AC.
Always follow the installation instructions for the protective devices you are
using.
4.6.3
Housing ground
Note the following information on the connection of the protective earth to
ground the housing correctly:
•
Note the assembly sequence:
•
1 M6 earth bolt
•
2 Contact disk
•
3 Cable socket
•
4 Washer
•
5 Return spring
(optional)
•
6 Nut
Contact disk, washer, return spring and nuts are supplied with the drive
controller.
•
Tightening torque: 4 Nm
•
Stray currents > 10 mA can arise in normal operation. To fulfill DIN EN
61800-5-1 and EN 60204-1, connect the earth bolts with a copper
conductor according to the following table:
Information
Check whether the use of residual current protective devices with
increased trigger current as well as with short-time delayed or
delayed switch-off trigger characteristics are permitted in your
application.
Cross-section A
Feeder
Minimum cross-section A
min
Earth conductor at earth bolts
A
≤
2.5 mm
2
2.5
mm
2
2.5 < A
≤
16 mm
2
A
16 – 35 mm
2
≥
16 mm
2
> 35 mm
2
A/2
1
4
3
6
5
2
